????:1???????:??????????

2???????????

3????????????

4????????vx

5???????????

?1??21?? (????? ????)1???????21?,“????????????????”???????????,????????????,???

1??21????????,?????????????????????????“????????”?? ????? ???????

?????????????????,????????,????????????????????????,??????,????????????????????????????????????????????,??

??????????????,???158???(?????????????),????????????????????????????????????????,????????????????,??????????????????????

?“??”“?”“??????”???????,?????????2800??????????????“????”,????????????????“?????????????????????”,?????

1?21??,???????????????“??????????????????????”??????????????????? ??????????? ???

??????,??,??????????????????????????,?????????,???????????????????????,???

????????????????,?,?“????,????????”???????,?????????????????????????,??,?????????????????????

?,????????????????????????????6???????????????????????1???(??????)

????????:????????????????????????????